Equivalent & Substitute Parts for 34LC02T-I/MS

Part Overview

The 34LC02T-I/MS is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz with 400 ns access time. The device is packaged in 8-MSOP surface mount configuration and operates across a supply voltage range of 2.2V to 5.5V with temperature range of -40°C to 85°C. This part maintains active product status and is ROHS3 compliant.

Substitute parts are identified when electrical and mechanical parameters align with the main device specifications, enabling direct replacement in applications where the core functional requirements remain constant. Substitution becomes necessary when primary part availability is limited, supply chain constraints occur, or design flexibility is required across compatible device variants.

Key Parameters

Parameter	Value
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	1 MHz
Access Time	400 ns
Write Cycle Time	5ms
Voltage Supply Range	2.2V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution logic for the 34LC02T-I/MS is based on the following critical parameters that must remain constant or compatible:

Core Functional Parameters:

Memory capacity: 2Kbit (256 x 8 organization)
Interface protocol: I2C
Write cycle time: 5ms
Package type: 8-MSOP or 8-TSSOP variants with equivalent pin configuration
Mounting type: Surface mount

Electrical Compatibility Parameters:

Supply voltage range must encompass or match 2.2V ~ 5.5V
Operating temperature range must support -40°C ~ 85°C minimum
Access time and clock frequency variations are acceptable when I2C protocol compliance is maintained

Packaging Considerations:

Primary package: 8-MSOP (0.118", 3.00mm Width)
Alternative package: 8-TSSOP (0.118", 3.00mm Width) with identical pin pitch and footprint compatibility
Packaging format (Tape & Reel, Cut Tape, Tube) does not affect electrical substitution

Substitute parts are grouped into two categories: direct electrical equivalents with identical specifications, and manufacturer-recommended alternatives with compatible but slightly different electrical characteristics (lower clock frequency, extended voltage range, or automotive qualification).

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	Product Status
34LC02T-I/MS	Microchip Technology	2Kbit	1 MHz	400 ns	2.2V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
34LC02-I/MS	Microchip Technology	2Kbit	1 MHz	400 ns	2.2V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
24AA024T-I/MS	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
24AA02T-I/MS	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
24LCS52T-I/MS	Microchip Technology	2Kbit	400 kHz	900 ns	2.2V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
BR24A02FVM-WMTR	Rohm Semiconductor	2Kbit	400 kHz	Not specified	2.5V ~ 5.5V	-40°C ~ 105°C	8-MSOP	Active
BR24G02FVJ-3AGTE2	Rohm Semiconductor	2Kbit	1 MHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
BR24G02FVJ-3GTE2	Rohm Semiconductor	2Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Not For New Designs
BR24G02FVM-3GTTR	Rohm Semiconductor	2Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
BR24L02FVJ-WE2	Rohm Semiconductor	2Kbit	400 kHz	Not specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Not For New Designs
BR24L02FVM-WTR	Rohm Semiconductor	2Kbit	400 kHz	Not specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active

Engineering Selection Recommendations

Direct Equivalent (Identical Specifications): The 34LC02-I/MS is a direct electrical equivalent to the 34LC02T-I/MS, differing only in packaging format (Tube versus Tape & Reel). Both devices maintain identical electrical specifications, clock frequency, access time, and voltage supply range. Selection between these variants depends on assembly process requirements and packaging handling procedures.

Microchip Technology Alternatives (Compatible I2C EEPROM): The 24AA024T-I/MS, 24AA02T-I/MS, and 24LCS52T-I/MS are manufacturer-recommended alternatives from Microchip Technology. These devices maintain 2Kbit capacity and I2C interface compatibility but operate at reduced clock frequency (400 kHz versus 1 MHz) with extended access time (900 ns versus 400 ns). The 24AA series supports lower minimum supply voltage (1.7V), while 24LCS52T-I/MS maintains the 2.2V minimum. All three remain active products suitable for new designs.

Rohm Semiconductor Alternatives (Cross-Manufacturer Substitutes): Rohm Semiconductor offers multiple 2Kbit I2C EEPROM variants. The BR24G02FVJ-3AGTE2 matches the 1 MHz clock frequency specification and maintains active product status. The BR24A02FVM-WMTR provides automotive-grade qualification (AEC-Q100) with extended operating temperature to 105°C. The BR24G02FVM-3GTTR and BR24L02FVM-WTR operate at 400 kHz with active product status. Parts designated "Not For New Designs" (BR24G02FVJ-3GTE2, BR24L02FVJ-WE2) are available but should not be selected for new circuit designs.

Product Status Consideration: All recommended substitutes maintain active product status except BR24G02FVJ-3GTE2 and BR24L02FVJ-WE2, which are marked "Not For New Designs" and should be avoided for new applications.

Frequently Asked Questions (FAQ)

Q: Can 24AA02T-I/MS replace 34LC02T-I/MS directly? A: Electrical substitution is valid. Both devices are 2Kbit I2C EEPROMs in 8-MSOP packages with identical write cycle time and operating temperature range. The 24AA02T-I/MS operates at 400 kHz (versus 1 MHz) with 900 ns access time (versus 400 ns). Applications requiring 1 MHz operation must verify that 400 kHz I2C bus speed is acceptable. The 24AA02T-I/MS supports lower minimum supply voltage (1.7V).

Q: What is the difference between 34LC02T-I/MS and 34LC02-I/MS? A: These parts are electrically identical. The difference is packaging format: 34LC02T-I/MS is supplied in Tape & Reel (TR) format, while 34LC02-I/MS is supplied in Tube format. Both contain the same die and specifications. Selection depends on assembly equipment compatibility and inventory management procedures.

Q: Can Rohm Semiconductor parts substitute for Microchip parts? A: Yes, when electrical parameters align. The BR24G02FVJ-3AGTE2 matches 1 MHz operation. The BR24A02FVM-WMTR, BR24G02FVM-3GTTR, and BR24L02FVM-WTR operate at 400 kHz. All maintain 2Kbit capacity, I2C interface, 8-MSOP or 8-TSSOP packaging, and -40°C to 85°C operating range. Verify that reduced clock frequency is acceptable for the application.

Q: Are 8-MSOP and 8-TSSOP packages interchangeable? A: Both packages have identical pin pitch (0.118", 3.00mm width) and footprint compatibility. However, physical package dimensions differ slightly (8-MSOP is 0.118" width, 8-TSSOP is also 0.118" width but with different body profile). PCB footprints designed for one package may require verification for the other. Consult device datasheets for exact dimensional specifications.

Q: Why should BR24G02FVJ-3GTE2 and BR24L02FVJ-WE2 be avoided? A: Both parts are marked "Not For New Designs" by the manufacturer, indicating end-of-life or obsolescence trajectory. While currently available in inventory, these parts should not be selected for new circuit designs to avoid future supply discontinuation and support issues.

Q: What voltage range compatibility must be maintained? A: The 34LC02T-I/MS operates from 2.2V to 5.5V. Substitute parts must support this range or provide a compatible subset. The 24AA series (1.7V minimum) and Rohm BR24 series (1.6V or 1.8V minimum) all support the full 5.5V maximum. Verify minimum voltage requirements match your application's power supply specifications.

Q: Does clock frequency affect I2C bus compatibility? A: I2C protocol remains compatible across 400 kHz and 1 MHz operation. However, the 34LC02T-I/MS at 1 MHz supports faster data transfer rates. Substituting with 400 kHz parts (24AA series, most Rohm variants) reduces maximum I2C bus speed to 400 kHz. Verify that system I2C bus speed requirements are met by the substitute part's maximum clock frequency.

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